| 摘要 |
PROBLEM TO BE SOLVED: To provide a heating device for lining concrete with which variation in temperature of lining concrete as a whole can be reduced in an inexpensive structure, and the concrete strength can be increased almost uniformly.SOLUTION: A heating device 7 for heating lining concrete C placed on the inner wall of a tunnel T, includes plural pieces of heating means 71 for heating the inner peripheral surface of the lining concrete C in plural heating areas A1-A4 set to be divided in circumferential direction of the lining concrete C, and control means 72 for operating the plural pieces of heating means 71 so that they are switched sequentially in a predetermined cycle. |
